The minimum allowable free fatty acid content is ≤ 0.02% (w/w), as determined by enzymatic assay. A review of recent lots indicates typical values of 0.00% free fatty acids. This information is lot-specific and reported in the Certificate of Analysis. Please see the link below to access a sample or lot-specific Certificate:
https://www.sigmaaldrich.com/product/sigma/a7030#product-documentation
Sélectionner une taille de conditionnement
| Conditionnement | Référence | Disponibilité | Prix |
|---|
A propos de cet article
biological source
bovine
Quality Segment
assay
≥98%
form
lyophilized powder
purified by
heat shock fractionation
origin
USA origin
concentration
≥95% protein
free fatty acid content
≤0.02%
technique(s)
ELISA: suitable, blood typing: suitable, ligand binding assay: suitable
impurities
essentially globulin free
loss
≤5%
pH
7
solubility
water: soluble (40 mg/ml)
UniProt accession no.
foreign activity
protease ≤0.005 U/mg
storage temp.
2-8°C
Gene Information
bovine ... ALB(280717)
General description
Les propriétés suivantes de cette BSA sont spécifiquement évaluées et testées :
- Très faible teneur ou absence de protéases
- Très faible teneur ou absence d'acides gras
Cette BSA dépourvue de protéases est particulièrement utile pour les applications suivantes :
- Dosages enzymatiques
- Tests utilisant des protéines
- Techniques sensibles aux protéases, dont :
b. Hybridation d'acides nucléiques
c. Dosages radio-immunologiques (RIA)
Application
- comme constituant d'un milieu utilisé pour la différenciation de cellules souches pluripotentes humaines
- dans des tests ELISA et des tests ELISA en sandwich
- pour perméabiliser des cellules corticales fœtales
La BSA A7030 est entrée dans la composition du tampon de blocage utilisé dans un test ELISA utilisant des peptides pour l'analyse d'échantillons de SARS-CoV-2/COVID-19 (Poh, C.K. et al., Nat. Commun., 11(1), 2806 (2020)).
Biochem/physiol Actions
Features and Benefits
- Fractionnement par choc thermique
- Absence de protéases
- Absence d'acides gras
- Quasi-absence de globulines
Preparation Note
1 of 1
Cet article | |||
|---|---|---|---|
| assay ≥98% | assay ≥98% | assay ≥98% | assay ≥96% |
| origin USA origin | origin USA origin | origin USA origin | origin USA origin |
| technique(s) ELISA: suitable, ligand binding assay: suitable, blood typing: suitable | technique(s) ELISA: suitable, western blot: suitable | technique(s) cell culture | mammalian: suitable | technique(s) blood typing: suitable, microbiological culture: suitable |
| biological source bovine | biological source bovine | biological source bovine | biological source bovine |
| Quality Level 300 | Quality Level 300 | Quality Level 200 | Quality Level 200 |
| form lyophilized powder | form lyophilized powder | form lyophilized powder | form lyophilized powder |
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Classe de stockage
11 - Combustible Solids
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves
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Numéro d'article de commerce international
| Référence | GTIN |
|---|---|
| A7030-100G | 04061835553563 |
| A7030-1KG | 04061835553587 |
| A7030-5G | 04061833425954 |
| A7030-100UG-KC | 04061833463338 |
| A7030-10G | 04061835553570 |
| A7030-5KG | 04061835540617 |
| A7030-500G | 04061835553594 |
| A7030-50G | 04061835553600 |
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What is the concentration or percentage of fatty acid free?
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Is this product biotin-free?
1 answer-
This product is not routinely tested for Biotin. However, this material is dialyzed with a 10 kDa cutoff membrane. This dialysis step removes small molecules such as biotin, which has a molecular weight of less than 500 Da. Therefore, this product is considered low in biotin, helping to prevent interference with streptavidin–biotin binding.
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If this material was inadvertently stored at room temperature, what is the room temperature stability?
1 answer-
This product is shipped at ambient temperature and is stable at ambient temperature for up to two weeks. For long term storage refrigerated temperature is recommended.
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How long would a 20% BSA solution be stable in water stored at 4C?
1 answer-
If stored at 2-8 °C, a filter sterilized 20% BSA solution in water or aqueous buffer is generally stable for a minimum of 2.5 - 3 years.
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Is it possible that BSA contains ions such as Mg2+? I am considering adding it to the buffer, but I am concerned that it might activate the enzyme.
1 answer-
The magnesium content of this material is not routinely tested, but historical data indicates that three lots contained between 10-20 parts per million. Water is used as the pre-lyophilization solvent.
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Is product number A7030, Bovine Serum Albumin (BSA) glycosylated?
1 answer-
Unfortunately, there is currently no information available regarding the glycosylation status of BSA product A7030.
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How does protease content determined? With this value all proteases are included? Or only refers to plasmatic proteases.
1 answer-
The specific method used to test this material for protease activity is considered proprietary. However, it is based on the enzymatic cleavage of FITC-Casein. See the link below to review the FITC-Casein Enzymatic Assay to demonstrate the principal of this method.
https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/353/850/c3777enz.pdfHelpful?
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what is the expiry of this product?
1 answer-
This product is not assigned an expiration date. It is assigned a recommended retest date of 5 years after the quality release date. The recommended retest date is the period of time during which the product is expected to remain within established stability specifications, provided that it has been stored under defined conditions. After the Retest Date, product samples should be examined to ensure that the product is still in compliance with the established specifications. For more information, you may access the "Product Dating Information" document under "ADDITIONAL USEFUL DOCUMENTS ABOUT OUR PRODUCTS" at the bottom of the Quality Services page with this link: https://www.sigmaaldrich.com/US/en/life-science/quality-and-regulatory-management/quality-services.
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What is the extinction coefficient of this product?
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The extinction coefficient for item A7030 has not been determined.
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is it suitable for cell culture?
1 answer-
This product has not been tested for suitability in cell culture. The end user would have to determine suitability. Please see the link below for a cell culture tested version of heat shock fractionated BSA:
https://www.sigmaaldrich.com/product/sigma/a4161Helpful?
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